Detect enter key pressed using javascript [duplicate]

Question

Possible Duplicate:
Javascript capture key

I'm working on reply function using mysql and php.

My MySQL db:

reply:   rid - id;   topicid - under which topic;   uid - id of the guy who replies;   content - what did the guy said. 

Here's my html code:

<form id="replyform">   <textarea name="rplcont" placeholder="Press enter to submit your reply."><textarea> </form> 

My question is: How do I know if enter button is pressed?

Many thanks.

/----------------------------------------------/

here's my codes that work:

html:

<textarea id="reply" name="reply" onKeyPress="enterpressalert(event, this)"></textarea> 

js:

function enterpressalert(e, textarea){ var code = (e.keyCode ? e.keyCode : e.which); if(code == 13) { //Enter keycode  alert('enter press'); } } 

and it works.

Thanks for everyone who concerns this topic!

Answer 1

var code = (e.keyCode ? e.keyCode : e.which); if(code == 13) { //Enter keycode     alert('enter press'); }